SlyOW
I say the Dragon Born being a BB reward is a little high unless being one makes you a literal dragon in a human body. The Dragon Born in game could take down dragons with his bare hands and slay all sorts of monsters, but he isn't superman. After killing a dragon, he'd exaust a lot of his strength and can be easily killed cause he's pretty squishy. I guess in other words, he feels closer to a glass canon unless he is wearing a lot of magical protections. Including the fact that his power of shouts is a power that must be unlocked/strengthened by dragon souls and is a seperate power from magic, he is probably closer to a C reward. B if he already has super strength and durability. This is of course taking into account that you must learn shouts.